How to Use: Cheer Up Buttercup Blend: Add 1 drop each of lime oil, grapefruit oil, 2 drops of lemon oil, and 6 drops of tangerine oil to your diffuser. Add to diffuser and enjoy. For aromatherapy. For other uses, dilute well with a base oil such as jojoba oil, grapeseed oil, olive oil, or almond oil before use. For information on dilution ratios, refer to essential oil related books or other professional materials.